[Lil Sis]

I am so sorry for you and your furbut.
It looks like you have received some good information in previous post.

I will say I lost a pup about 2 years ago--- zoey --- crf-- I was told it could have been toxins or birth defect. I racked my brain, the only thing I could think of was Tylenol. She pasted in my arms... but it seams you may have caught it early enough to have hope... do all you can.

My thoughts and prayers are with you.