Books in the Upchuck and the Rotten Willy series

It's not so bad living a dog's life. Unless you're a cat. Most times, hanging out with Rotten Willy (the huge dog on the cover) was cool. We played chase, talked, and chowed down on spaghetti and meatballs at Luigi's restaurant. Even though he was a dog (and sometimes called me Upchuck instead of Chuck), I could handle it. He was my best friend. Then this baseball stuff started and Willy went bonkers. I never saw him act so crazy. On top of that, these two new cats moved into our neighborhood. Trouble was, tough-guy Roscoe and his cute fuzzy sister, Rikki, did not like dogs. Dogs belong with dogs and cats belong with cats, they said. I was showing them the sights when I suddenly spied the dogcatcher, just waiting to trap Willy as he raced across the field with a baseball in his mouth. But Roscoe and Rikki would never understand if they found out my best friend was a dog. How could I save Willy before it was too late? What's a cat to do when he has to choose between old friends and new -- and there's no time to lose...

Spring has sprung - and so have we... even cats and dogs get crazy in the spring. After all, what self-respecting cat (that's me, Chuck) stays somewhere he doesn't want to be? And what self-respecting dog (that's Rotten Willy, who calls me Upchuck) won't let his best friend (me) goad him into action on a fine spring day? Believe me, it's not easy getting a lumpy Rottweiler over - or under - a big wooden gate! I figured it was about time I took Willy to my pal Luigi's restaurant for a great spaghetti and meatball dinner. Problem was, Luigi didn't understand that some dogs and cats, particularly an exceptional feline like me, can be friends. He was only trying to protect me when he took after Willy with a skillet! Did he run! Then Willy decided to teach me how to chase cows. ME chase cows? Me-ow! I tried to introduce him to something more civilized, like chasing mice, but no go. Then came the skunk. Need I say more? But the real obstacle to a long-lasting friendship was yet to come.