Both

Pulling on Bubbles leash Sarah said "well i cant guarantee either way will work for sure so lets go with both", while leading Bubbles to the barn Sarah made a stop to see the same lab coat woman as before who Kate was finally able to learn the name of as Sarah called her Vanessa when they walked in, she was working in a large lab underneath one of the smaller buildings on the property, Sarah asked her to "acquire some merchandise" which Kate took as code for ****, unknowingly letting out a little whine Kate cursed herself as others were now going to be dragged into the mess she made although that probably means Lara will be spared a **** pregnancy she thought, looking down at her front paws she felt more powerless than ever, what can i do to save others when i cant even save myself from becoming a dog.

Once the lab visit was over Sarah took Bubbles to the barn which Kate assumed was only to torment Lara by showing how far her mothers transformation had come but after Lara's initial shock and an explanation from Sarah, Kate was surprised when Sarah started talking about getting a partner for Lara, looking up from her position on all fours Kate could see the smile on Sarah's face when she looked down and said "actually we might not need a guy after all but i will need to make some arrangements", with that she left the half animal mother daughter pair alone.

Being together with her daughter for the first time after becoming quadrupedal and losing her voice, Kate was unable to look Lara in the face so to distract herself she decided to try using her paws to write some words on the floor like Lara had learned to do but after a dozen or so failures she couldn't take the shame any longer and silently left the barn.

Over the past week Kate's transformation continued starting with her growing four extra nipples and then it was her size that had changed, estimating that she was about 30% smaller than she was before Bubbles decided hanging about outside the barn was best as she could avoid Lara, other than when she was **** to lead the cows to and from the field she had stayed away mostly because of the shame but also so she could keep a watch on the labs entrance, two days after Sarah had placed the order for "merchandise" a van arrived and a couple of young girls had been taken hands and legs bound down into the lab, ever since then Kate had kept watch to see when they would come out but apart from a normal cow leaving the lab three days ago there had been no sign of them, today deciding she couldn't wait any longer Kate used her new dog senses and size to get into the lab without being seen.

"yes yes the new girls were perfect guinea pigs" Kate heard Vanessa say into the phone, while stalking her as she moved around the lab Kate overheard how she was able to turn the first girl quickly into a cow by concentrating a little bit of Lara's DNA and injecting it directly into the girl instead of the slower method of ingesting DNA like with Kate, just before she hung up she said "oh and the package you have been waiting for has arrived, i left it in the barn"

While Kate was listening to Vanessa she realized that the same thing could be done to Lara to restore her to normal, all she had to do was find some of Lara's DNA from before the hucow transformation accident and then if Lara could be returned to normal she could easily use her powers to not just escape but to put a stop to this whole farm, while leaving the lab and getting back outside Kate was immediately snapped out of her thinking as Sarah approached her rapidly and quickly put a leash on her collar tugging her towards the barn.

On the way all she could think of was does she know what i had been doing in the lab but after seeing what Sarah had prepared when they reached the barn those fears were the least of her worries, Lara was trapped in a breeding stall struggling on some restraints, tying Bubbles up next to the stall Sarah grabbed a clear container of white liquid from a small fridge and off a nearby shelf a very large strap on dildo in the shape of a horse cock which she began filling, after she was finished Sarah put the dildo on Bubbles and lifted her quite easily(given how much lighter she was now) onto a small raised platform behind Lara.

It was obvious what Sarah was intending and Kate was not going to go along with it, that was until Sarah zapped Lara with a cattle prod "i knew you would refuse and hurting you wouldn't make any difference as a mother will do anything for her child but if i zap Lara once for every minute you refuse i think you will realize you giving her pleasure is better than me giving her pain" Sarah stated with a sadistic grin, with **** left to her Kate knew the only thing left was to fuck and impregnate her own daughter.

Moving in closer to Lara Kate decided that if this was going to happen she was going to make it as enjoyable as possible, Lara deserves at least that given all the horrible things that have happened to her because of me, using her now quite long tongue she first licked Lara's much larger cow pussy which was surprisingly quite wet, she kept that up for several minutes before pushing deeper until her nose sightly entered Lara, her new dog senses were going crazy and her human mind was struggling to keep up, soon she pulled her muzzle out and jumped up on Lara's back forcing the dildo into her daughters pussy, hearing Lara cry out in pleasure Kate went slowly at first then started going faster and faster until she could feel that Sarah has squeezed the injector on the fake cock flooding Lara's pussy with cow semen "congratulations you just knocked up your own daughter" Sarah said before removing the fake cock and putting Kate back on the floor.