Breeding Whelping or Birth. From the time of mating, many females will show changes in behavior, often becoming more affectionate. However, some pets will become uncharacteristically irritable and may even act aggressively during pregnancy.
Dogs may also have vaginal discharge before birth that is clear to white. If a clear or white sac is noted protruding from the vulva (external genitalia), whelping should be imminent. If green discharge is noted, it should be followed immediately by a fetus, as this indicates placental separation.
Common Cat Behaviors and What They Mean. Unusual or strange cat behaviors that your cat may be exhibiting when they are stressed or when something is wrong can vary depending on your pet, but often more than not, they tend to be fairly easy to spot. Cat laying on the back.

If your cat seems overly aggressive, there could be several reasons for his or her behavior. Learn more about the causes and types of feline aggression, and how you should respond.
our cats body language and behavior isnt all randomin fact, some of those odd behaviors are signs that your cat is trying to communicate with you. Read on to learn about some common cat behaviors, and what they might mean.

Cat Neutering and Behavior | VCA Animal Hospital.
When your cat presses their paws into you and massages back and forth, it can be an enjoyable feline behavior. Your kittys instinct to do this traces back to their earliest days of nursing. By pressing his paws on their mothers mammary glands, it encouraged better milk production.
Imagine a world where whelping and queening no longer come with the constant guesswork and last-minute scrambles. Its no fantasymodern technology is transforming how dog and cat breeders approach birth predictions.