Cam's Best Friend, by Jaxx Steele MM

Cameron Gamble is a simple man finally free from an awkward life. He starts over in a new city, opens a business, and finds the perfect best friend, Mel--a chocolate lab. It isn't long before Cameron and Mel are inseparable and Mel has a permanent place in Cameron's heart.

One night, Cameron recovers from a nightmare with Mel by his side. The bright light of the moon reveals Mel's true nature and all is well in Cameron's world from that day forth.

Until his ex-lover shows up with the intention of wreaking havoc and destroying Cameron's new found peace.