Hello - my parent's cat recently had a tooth extracted and has been healing nicely. The vet had given her amoxi tabs to take twice a day for 10 days. She's been doing ok but today she threw up twice. The first time was full of fur, about an hour later she threw up a second time and it was all liquidy. My mom called the vet who said she probably threw up the second time b/c of the furballs she let off an hour earlier. Is this normal? She is 11 years old and has never taken amoxi before. Any information anyone has would be helpful. Thanks!