I'm not so sure that it is a liver shunt or MVD. You said he ate quite a lot of the i/d and was doing much better? With liver shunt, the protein in the i/d would actually make him worse after he ate as his body is flooded with toxins. Yorkieluv would know the answer to this.
You said you were going to return him to the rescue? Did you mean the animal hospital where your parents got him or will you be giving him to a rescue organization? I would love to see diggy4 get him. I'm sure that the two of you could keep in touch so that you could see how he was doing.
Regardless, I think that you are doing the right thing. It takes a really special person to be willing to give up a dog they love so that he will get the care he needs. If he is getting worse quickly then he does need tests right away to determine the problem. You're doing a really good thing.
__________________  I LOVE my little Furbutts! |