Just in case you need it, I know I've recommended these guys on posts before, but I do like to promote good businesses.....If you need pet-sitting in HK, I've been using these guys for past 2 years with my cats. They're a very nice English couple and very cat friendly....
http://www.wishyouwereherehk.com/.
Also, for cat stores in HK here's a couple of places I've used which I've found to
be decent (i.e. no animals in small cages....pet friendly and honest)
Moggy's Pet Supplies & Grooming.
Flat 1/F
Hoi To Court
275 Gloucester Rd
Causeway Bay
2575-7698
She's a very nice lady who used to work at SPCA. Carries specialty foods like Innova and Natural Balance. Has cutie cats roaming free around the store.
Bubble Bath
2869-8988
1st floor, 55 Wellington Street
Carry Eukeneba and Solid Gold. Have cute doggies roaming free in the store.
Mid-Levels Pet Services
located exactly opposite the Mid-Levels Veterinary Centre at 28 Mosque Street.
Right off escalator.
SPCA
http://www.spca.org.hk/