I have been fortunate to help rase 2 dogs from pups with lots of love.... in that time with the dogs I have trained both to sit,give paw,lay down, sit, and potty trained... not to mention 2 of the most loving and playful dogs I've had a pleasure of being around... they would always jump in the bed to wake me up to take them out and play or use the bathroom... a tennis ball was the best toy I could have ever got them with out even knowing it... I went through toy after toy but a tube of tinnis balls actually got the job done better than any chew toy I could have picked up from the store. They hated taking baths though.lol