Arnold would never volunteer to hunt fellow men, not that the women really needed a sniffer dog. But either way he would rather be a guard where likely he would never see any men and have to betray them. Making up his mind he barked once, irritated at his lack of speech.
Espinoza smiled, "very well Sentry, guard dog it is, wait in the cage until I program the system. If you step on that grate before I tell you to... well trust me... you dont want to become Kibbles".
Arnold furrowed his eyebrows what could be worse than being a dog anyways. Either way he waited patiently if not irritably in the kennel. He was too focused on Espinoza working the panel to remember the steak chunks by his fore paws. Soon she was done and waved him onto the grating of the platform outside his kennel.
Arnold crawled out onto the platform until he was in the middle of it and felt frozen in place. Arms fell from above and began injecting numbing drugs all over his body. They numbed his arms, legs, torso, neck, face, etc. Had he not been held in place by whatever kept him frozen he would have collapsed like a limp sac. Soon though the arms retracted and the grating becan to lower into the circular platform. Sticky thick black fluid began oozing through the holes in the grating and covering him as it rose. A small muzzle shaped mask wrapped around his maw to give him air as the liquid finally rose above him surrounding him in darkness. Arnold couldnt hear anything and didnt dare open his eyes. He could however feel pressure all over his body.
He couldnt tell how long he was submerged in the fluid, but knew things were different. His legs felt shorter, his feet smaller. His back when he flexed it in the fluid would not permit standing. His ears felt like they were larger and at the top of his head. His arms were shorter and his chest pushed out below his neck. He knew he had a tail now, and could feel It when lowered rub against his anus. He was stuck this way for a long time until suddenly he was raised back up the black latex slipping back through the holes in the grate below him. The mask popped off his muzzle after covering it in latex as well and Arnold looked around. Despite being covered in latex he felt as if he could still move freely. His tongue lolled out to pant and he licked his chops feeling the extremely smooth texture.
Espinoza walked over and knelt to be eye level with Arnold. He could see her admiring his latex sheen, his fully canine body.
"You look adorable Sentry, maybe you would like to be my..... personal guard doggy"?