My boy Sunny would howl on cue. We had a little "howling song" that we would sing, and that set him off. Also, the phrase "you're only a dog and that's all you'll ever be" would result in instant howling! And once started, he would continue. I have a video where I picked him up and held him upside down, and he continued to howl!
Critters that call me grandma
One son and wife have Mona, an enormous rottweiller who sometimes knocks me over in her eagerness to say hi to grandma. They also have Toad, a black lab puppy and Rufus, a fat cat who was rescued from a neighbor's roof. My son in California has Pete, a parrot, who likes to sit on his shoulder while he's working at the computer and says Change the channel, dork, to which my son replies Dude, this is a computer not a television. He also says Turn the light out buddy. They are currently working on saying Hi Grandma, so any day now I expect to get a very strange phone call….