My 8yr old Boston high liver enzymes.?

My 8yr old Boston has been loosing weight , . So my vet removed some teeth. now he said he has high liver enzymes. only thing I can do is give him supplements( name is: Pets Liquid Hepato),an it says it supports liver function, an retest in 30 days. He doesn't seem to be getting better. He keeps getting stuck in corners , places he would never try to squeeze into. Isn't their something else. I don't have a lot of funds, but want him to get better.