
Mine tend to not want food after whelping. I just put glucose in the drinking water. If a bitch doesn't want to drink, that worries me more than lack of food. Then I use evaporated milk in the water to encourage them. Although I have promised myself that I will try Nutrilac for my next litter, as Barbara sings its praises highly.
I usually have to literally carry them outside and close the door so that they will have a wee. They seem to close down their systems, not wanting to leave pups. I actually hold a dish under their noses inside the whelping box, mine won't even come out to eat. So I will do this for however long is needed.
Tuna and chicken sounds fine to me, I don't give raw chicken either with this breed - I tend to tempt them with anything except their normal food - they will go back to it when they are ready. My favourite is white fish to tempt, as I can steam it in half milk, half water. I stock up with the value packs that Sainsbury's and Tesco do. A couple of quid a bag, assorted shapes and sizes.
Altough I always leave a bowl of puppy kibble just outside the whelping box just in case, mine don't seem to eat much dry for quite a while after whelping.
If a bitch just won't eat at all, like everyone else, I will try anything! Full creamed rice pudding, scrambled egg etc. No two bitches ever seem to have the same favourite!