By this point, your pet should be back on his normal routine, and the incision site should look fairly healed. At 10 to 14 days, any external sutures will be removed by your vet, and if your dog had absorbable sutures, the incision site will be looking less prominent (though it can take up to two months for them to be completely absorbed into the body).
In all likelihood, you won't notice any behavioral or personality changes in your dog, says Lund, though altered hormone levels may make some pets less aggressive or territorial. If your female dog gains weight after spaying, that could be due to overfeeding and lack of exercise — not the surgery.
Your dog will go about his (or her) life just as before, but without the risks associated with reproduction.