After her shower, Sarah dried herself off, while being extra careful around her ears specifically, and didn't bother to get dressed. If she is naked, it will help her notice any further changes to herself a lot quicker.
Dan and Daisy were back outside again, playing in the last few minutes of light. Sarah watched them play from the livingroom, still not realizing that the recording was being broadcasted from a small speaker nearby due to the low volume level.
While she stood there, a nub formed at the base of her spine and began growing outwards, pushing out several inches into a hairless tail. But that didn't last for long as soon a nice coat of dirty blonde hair grew all over it. She began absentmindedly wagging it as she watched her dogs play with each other, somewhat feeling left out of the fun. But when her tail smacked her thigh, she quickly came out of the daydream and panicked. Ears could be hidden with a hat, but a tail is way harder to hide.
So she went and found some ear plugs and began scouring the house for the source. It took her a good hour before she finally noticed the red light on the speaker inside the display cabinet. She had found the spot the device was at, inside the bedroom, so that had tipped her off to it being broadcasted over a bluetooth speaker somewhere in the house.
When she stopped her search, she noticed Dan and Daisy had been just sitting and watching her. Dan now sported 4 rows of small breasts while Daisy had a fully formed, but empty sheath and had no breasts to speak of. Both of them had fully formed tails too. In fact, they were clearly past the half way mark in their transformation into being full blown dogs. But where is the fun in that?
Sarah woke up Dan and Daisy part way. They would be conscious enough to speak with, but still have enough of the programming left active in them that they initially won't question the current state of their bodies. Especially about how they now technically have swapped genders. Only when I bring it up should they suddenly realize that something is very off about them.
"Good evening you two, how are you both doing?" Asked Sarah in her most genuine sounding voice she could manage. She didn't care all that much, but this wasn't the main point of the conversation anyways. "Fine I guess, and thanks for making us dinner tonight, it was very tasty" says Daisy while licking her lips. Dan nods and adds on to it further. "Oh yeah, and thank you so much for house sitting for us. And I know that we said that you could have free range of the place, but well, would you mind putting some clothes on first?"
Sarah smirks at the irony of Dan's request. "I will when you do, Danielle." Sarah had intentionally called him Danielle just to see what would happen. Oddly enough, Dan, or Danielle, seemed to just take it in stride and was completely unphased whatsoever by it. He, or now more like she, looked down at her self and shrugged after seeing her 8 protruding breasts on full display. "That's a fair enough point I guess. I'm sorry for asking you to do something so hypocritical."
"Bad girl! But apology accepted." Sarah pet Danielle on her head and moved on to Daisy. "And what about you, boy?"
Daisy proudly sat up straight, with her head held up at a heigher position than Danielle's was kept at, displaying her superior status over her bitch. In reality, she was now a lot smaller than Daisy too, as the both of them had physically changed a lot. Daisy was now taller, larger, and stronger than her bitch Danielle, who actually had become more petite, save for her breasts, as her changes happened.
"I am very content, Master" said Daisy. She had been exposed to the device a lot more than Danielle had lately, so it made sense that she is further along than she was. However unlike Danielle, who had breasts, lost her dick completely, and now sported a canine pussy with the last 2 remaining aspects of her former maleness hanging beneath her new slit, Daisy still had not even fully grown her new dog penis, and had her pussy still inside her sheath her clit certainly was longer than anyone's should ever be, but it was not quite a canine dick, yet. But it was only a manner of time. She had testicles already hanging so she is nearly there.
"Is that so? Good then. Now then, let's talk about your bodies and how inhuman they are." Suddenly both Danielle and Daisy's eyes widened in disbelief. "Holy fucking shit! What the hell is going on here! Huh, what the fuck is up with my voice?" Shouted Danielle in a now much more feminine sounding voice. "Oh my god! Dan, you sound like a girl! And do you, do you have tits!?" Said Daisy, more concerned over Dan's body than her own.
"Quiet!" Sternly said Sarah. Both dogs stopped speaking immediately as their Master had just commanded them. Let me inform you of your situation. You two are going to become my pet dogs, or rather, you already are. Thanks to a bit of mental programming through hypnosis and some other pretty advanced stuff that I won't get into, your bodies have undergone a significant amount of change, even reversing your genders in the process. I won't allow for the two of you to fully become dogs however. I prefer you to have some human features still, like your faces for example. Now then, you have 2 options, either keep your mind and willingly submit to the changes and being my pet, or go back under the hypnotic trance and do the same exact thing anyways? The choice is yours, and will be the last one you make as people, since from now on, you both are going to be just dogs."