The Doctor comes to visit.

Early one morning Rose was taking a little nap in her dog house when she was woken up by Petunia slapping her ass.

“Wake up,” She said, “I have someone for you to meet”.

Crawling out of her dog house Rose was surprised to see someone new next to Petunia.

“This is Doctor Watson” Petunia said “He deals with people like you and he's here to give you an exam and to help me install some new equipment to use on you”.

“Hello, Rose” Doctor Watson said “Nice to meet you now why don't you get up on this table over here so we can begin your examination”.

Her heart beating Rose obediently hopped up on the table that was set in the corner of the basement and she laid down.

“Now Rose” Doctor Watson said “I'm here to first examine your big natural udders and to check your two breeding holes on your rump”

Soon Rose felt the doctor's warm, strong hands running down her back, touching every inch of her skin and making her shiver.

The Doctor cupped her butt in his hands and gently stroked the length of her tail back and forth.

Rose pushed back against him with a whimper as the sensations made her ass ache for more, but he only laughed.

"Not yet, pup. We'll get there. Be patient."

Rose whined a little but didn't do anything

The doctor continued feeling her underside, lingering at her labia but without delving into it. His hands roved over her belly and up to her breasts. He took one breast in both hands, massaging towards the nipple in a way that made Rose moan in pleasure. He attended to the other breast thoughtfully and was happy with the spurt of milk that came out of both.

“Let me get a look at your teeth, please." The doctor said as he swept his hands up Rose's throat and held her chin, using his penlight to examine her obediently open mouth. "Hmmmmm," he said, his left thumb feeling her lower lip.

Then he gently massaged around her ears and ran his fingers all through her hair checking for bumps and sore spots.

The Doctor then opened a box he had on the floor and pulled out a pair of stirrups to attach to the table.

He fit them in with a metallic click and had Rose settle her back paws into them. Rose moaned as he began to rub her clit between his fingers, examining it before stroking it and then working his way back along her labia with a doctor's eye.

He then ran his finger along the whole length of her vulva while focusing on her clit again. Keeping his right hand busy on Rose's clit the doctor moved his left hand down to her cunt and started examining the opening with his fingers. Rose pushed against him as well as she could and he slipped two fingers inside her and methodically felt into her vagina, feeling the walls and working up to her cervix.

To make Rose feel good the doctor curved his fingers to find her g spot that made her moan through the gag that Petunia had put back in.

“Ok” Doctor Watson grabbing another device from his box “We are going to test your nipple stretching capabilities Rose with this device called the Tower of Pain”

He explained to Petunia “You can attach this to her collar what it is Mrs. Dursley is this is shaped like a t with a pole that has two branches on both edges with clover clamps on the edges” He said, “I recommend you also get some clover clamps as they are good at preventing any leakage from her nipples”.

Petunia attached the tower to Rose's collar who winced when the clover clamps were attached to her nipples.

Doctor Watson twisted the lever on the machine every few minutes tightening the pressure on Rose's nipples until after about 10 minutes he took the machine off.

“Wonderful,” The Doctor said “You really have a perfect cow here Mrs Dursley”.

“She has great holes, very stretchy nipples with incredible potential, wonderful large natural firm udders, she is very shy and obedient and she seems to love vaginal and anal stimulation a lot.”He said, “There are still some more things I would like to try on her though”.

“Sure,” Petunia said “Do whatever you want she doesn't care”.

“Has she been milked today yet?” Doctor Watson asked.

“No”Petunia said “Not yet”.

“Perfect,” The Doctor said “Her udders are already big and juicy at such a young age, but her nipples need some more work”.

“This is my next machine,” Doctor Watson said “The Nipple Pulling Machine will help to elongate her nipples which won't be easy but it will be necessary to help Rose become the perfect cow”.

The Doctor showed Petunia how to attach the clamps from the Machine to Rose's nipples which when turned on started tugging on her nipples making Rose whimper.

After a few minutes with the nipple-pulling machine, the Doctor took it off Rose and then after getting her ready attached the cow milker to her nipples starting the milking process.

When Rose had been fully milked and her milk collected and stored the Doctor then put the nipple-pulling machine back on pulling Rose's over-sensitized nipples again and again

“And this is the last machine,” The Doctor told Petunia “In order to improve her milk flow you want her incredibly stimulated and thus her nipples need to become very sensitive”.

“These nipple sensitizer cups will automatically suck the nipple in until it touches the sensitizer. then, with another button, you can choose 1 of 10 programs to stimulate and sensitize her nipples.”

Rose panted and squirmed as the nipple sensitizers did a number on her body that was already worn out from the Tower of Pain, The Milking Machine, and the Nipple Pulling Machine.

Neither Petunia nor the Doctor noticed or cared how many times she cummed during the whole process.

Once the doctor took the nipple sensitizers off he and Petunia noticed how puffy and red Roses nipples had become, and double the size!

The doctor then reapplied the nipple clamps and turned to Petunia.

“You certainly have a nice cow, Mrs. Dursley,” He said “I'm giving you these machines free of charge to help you out with her and I will be in contact with you in the future to deliver some more things for you to try out”.

“Wonderful,” Petunia said as she and the doctor shook hands and Rose cummed another time.

(Any suggestions for what you want to see next are much appreciated the more graphic the better)