My 4 month old westie loves picking up stones and chewing them, the last 2 mornings he has woken up, been a little sick and has brought up a small stone !!! I do my utmost to stop him chewing stones but its rather difficult as part of our garden is covered in stones. Anyone got any ideas on how to stop him.

Also at what age should he start going to a groomer. If any of you westie experts have any tips on keeping my dogs coat in good condition I would be grateful. He has 1/2 Vetzyme conditioning tablet and 5ml of Complederm (a mixture of oils and vitamins including Evening Primrose Oil) daily.