Doggie days

Hey everyone, my mum's new dog, which has had several different names since she got him, but is now called Max. made me think earlier. He is a 16 month old very sweet Jack russell. Mum had bought him a ball with a bell inside for him to play with. It is pink, and he played with it a little bit and then refused to play with it again. He prefers and old yellow tennis ball. I have heard dogs can only see in black and white, wether this is true or not I don' t know, but I wonder....is he not playing with it because it's pink, or some other reason? I will leave you with that, I have to revise Gender now, funnily enough!!! See you, love from Nicola xx