When Millie, my Cavalier King Charles Spaniel, was spayed, she hated wearing the collar she got from the vet. To keep her from licking the stitches, I bought a pack of baby vests. I pinned them up when she went out to the toilet and fastened the press studs after she had been. I was able to leave her unsupervised especially during the night, knowing she wouldn't be licking the stitches.
The wound was kept clean and healed quickly, and Millie was quite happy and comfortable in her little vest