Vet schedule per year for a guinea pig?

Answers:
What do you mean? I will answer the question as much as I can through my understanding of what you are trying to ask.
Guinea pigs need to go for an annual check up every year. This should be done at an exotic vet as the people that work at these places specialise in rodents like guinea pigs, whilst this will cost more it is better for the health of your guinea pig.
Other than this guinea pigs need to be taken to the vet if there is any sign of lethargy, blood, blood in urine, distress, pain etc. If you are worried about the health of your guinea pig, take it to the vet. Do not dismiss signs as allergies, take the piggy to the vet. Guinea Lynx is a great site all about the health of your guinea pig
http://www.guinealynx.com/index.html...
Good Luck!!

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Give them an annual checkup every year. There are not many guinea pig vets, but at least take them to one vet every year.