Only downside: if your pup has medium or longer length hair, it may cover most of the collar which makes it tough to see. I bought a medium for my 50 lb. Aussie and it's extended at full length, but fits nice and loose. I bought a large for her Berner buddy and it fits him with room to spare. Only other notes: it's easy to use, but the D-ring knocks against the plastic buckle when she runs and makes an audible knocking sound. If you pup is noise sensitive, a piece of cloth tape wrapped around the apex of the D-ring may help.

My dog and I love this disc. It's soft enough that I don't worry about her teeth, but it has left her gum bleeding once. The batteries seem well enough protected and I haven't had any trouble rinsing it off. One big downside: Last night, my dog stopped and sat next to her disc instead of bringin it back. When I walked over, I saw that the battery cover had come loose and was lost in the grass. The batteries clip to the light insert, so I was able to find it still shining bright a couple of feet away, but alas, we can't use it as intended without the battery cover. However, we had loads of fun with it before that.

I was really excited to get these shoes in the mail because they appeared to have all of the typical features I look for in a winter shoe. Unfortunately, they don't seem to follow the typical KEEN fit. The toe box is unusually tight. I don't have wide feet and can usually wear any brand of running shoe, but my toes actually feel as though they've been stuffed in a tigh pillow box and threaten to fall asleep on me when I put the shoes on. Also, the laces are too short to get a good cinch on. In addition, the laces need one more eyelet at the top to get a good fit. The opening at the ankle is so wide that, combined with low-sitting laces, I have a difficult time tightening the shoe to where my heel doesn't slip. Sadly, I think I'll return them as I've been avoiding wearing them. I ordered slightly large for me, but the toes are tight and if I go any larger, my foot won't stay in it. It's otherwise a very smooth, nice looking shoe with a great in & out sole.