I do miss my boys when we're away, but I know they're being spoilt rotten and I get regular updates via text from my Mum.
I'm happy to leave my pets down with my parents as I do a swap with animal and greenhouse sitting duties when they go away. My parents live in the village I grew up in, and are closer to my workplace than I live now so I quite enjoy house and livestock (chickens and one very acnient duck who hatched on the 1st December 1995 and is still going strong) sitting for them.
When they had the family dog and couldn't take him away with them he'd come into work with me and have a wonderful time being fussed over by all the students. I really miss him.