Years ago, I lost my own personal pit bull to a fast growing brain tumor. Unfortunately, in both human and veterinary medicine, brain tumors can result for no known reason. While genetics and environment may potentially have a role, the underlying cause for brain tumors is typically unknown.
The Havanese does not have to be really light. Depending on the size of a Havanese the weight ranges from 7-22lbs. I own a very athletic agility Havanese that stands 11â³ at the withers. She weighs 18-20lbs depending on how much training she does and her muscle mass. From the AKC Standard.
Your yorkie is usually supposed to weoght about 11-12 lbs. Ask your vet for more details. but most weigh a few ounces if they a teacup but if not a teacup they should weigh up to about 6-9 lbs. but some where between a few ounces to about 9lbs. depending on the size (teacup, tiny, regular, small). ___________. Edit: A reputable breeder will strive for a mature weight between 4-7lbs.