Examples of animals that need foster care are: puppies and kittens under eight weeks of age; animals with special medical or behavioral needs; or mother animals with nursing litters. (humanesocietymiami.org)
We describe especially sexual attraction and the concern of mother animals for their young as love, and occasionally we observe among animals additional relations to which we spontaneously apply the word «love.» (religion-online.org)
Mother animals don't often mate when they're raising their little ones because their bodies couldn't possibly handle another pregnancy. (mommyish.com)