
Top of my list is Dopram V drops to stimulate the pups breathing, Vet/Nutrodrops to boost bitchs energy levels during labour and give to pups who need a boost without filling them up[ Canine Chemist/Hyperdrug best online supplier, they also have whelping kits]
Heat pad plugged in at start of labour. I also have a microwave heat pad for any trips to the vet.
Lots of newspaper for labour and pups to wee on when older.
Vetbed for after labour, several pieces so you always have one clean and dry to put into the whelping box.
Forceps to clamp cord, dental floss to tie off any that won't stop bleeding.
Some way of marking each pup.
Scales