Hi there~ I also breed and do not give Leukemia.
Before I ever Bred,I had a cat who was tested for this and came back neg. the vet suggested we give the vaccination...know Zip I did...wouldn;t U know I lost my cat to leukemia 10 months later!!!!
So I made the choice long befor breeding never to give this again ever.
I am not sure what U could do other than keep looking for an in home sitter.
I would never give this in order to take them to a boarding house.......He may also get other things there you do not want....ring worm,fleas,herpies ect ect
best wishes on this.
