What is the normal body temperature of domestic animals and birds in centigrade?

It depends on the species, here are a few of the common domestic species and their normal temperatures:

Dog - 37.5-39oC

Cat - 38-39.5oC

Cow - 38-38.5oC

Horse - 37.5-38.5oC

Pig - 38.5-39oC

Sheep - 38.4-39.5oC

Most birds - 40.5-42oC

Rabbits - around 39.5oC

There are minor variations in 'normal' ranges depending on where you look them up therefore slight variations may also be seen as normal (e.g. a dog with a temperature of 39.3oC would probably still be considered to have a 'normal' temperature).