how much does it cost to spay a cat
1 Most veterinarians offer the option of pre-anesthesia blood work, to make sure the liver and kidneys are working properly, for about $40. 2  It can cost $25 to $30 extra to spay a female who is overweight or in heat. 3  It can cost $50 to $100 or more extra to spay a pregnant cat, depending on the stage of pregnancy.