Brownie is an inside dog, she only goes out for "walks" with me in my frontpack or in my handbag. She will only walk a block by herself at the most, lol. There is no possibility of any males around her when she's in heat and that's why it's so difficult for me to go through with this spay. She also wears panties while she's in heat so it doesn't ruin my furniture. So, this all being said, is the spay still necessary??