I went into pah today and had a look at the collars there, the only half check one they do is the same one listed on the web site (our local one hasn't had any of the others in for a long time) I had a good look at it and tbh the clasp that locks the collar looked pretty cheap - infact if I was going to get Katie a new half check I'd not be buying one from there. I gave the collar a sharp tug around the clasp and it's definately not safe for a dog that might pull. The plastic is soft and theres no secondary way of stopping the collar from undoing. Looks like next time Katie needs a new collar I'll be spending my money in the small pet shop that charges 5x as much for the same thing.