We've ordered a dozen or more of these in the past and they are always very (very!) hard to get through the first few times. No trick I've ever found besides pushing really hard. =/ . After that it kinda loosens up, but still secures just fine.

23 cm is about 9 inches or so. So figure out which measurement that corresponds to, either cone depth or the size of the neck.

Hi bluesoups, The collars were designed to be different sizes. As to why 2 inches was chosen as the difference between the medium and large it is because those two sizes fit the most pets. Thanks,

Hi corgilover313, We suggest that you measure your pet's neck and check the sizing guides for each size in the attributes/specification tab on the product page. Thanks,

Hi Joye43wil, It varies depending on the model. From XS to XL it goes: 4.5in, 5.25in , 7.25in, 9.25in, 12in. Thanks,

Absolutely!  Best in a round container  vs an elongated one that could stop the cone from lowering to the floor.  Should you feed in a fancy type of dish or dish stand, you may reconsider a temporary round one. The cone will fit right around it and the pup still have total access.  They may think their world has come here to an end but they’ll get used to it!!  Ultimately, we have more of a problem than they do!!!

Hi Max1970, We are sorry to hear about this. We suggest that you contact the store if it was an in-store purchase or our Customer Relations department at 877-738-6742 if it was an in-store purchase. Thanks,

Hi Lil Mo, Either 2404455 or 2404447 should work depending on the dog’s neck width. Thanks,

This was for a 7 lb Shih Tzu

I used mine for a dog- if the cat is the same weight I don’t see why not.