I've had somebody recently contact me regarding a dog collar for their F1 goldendoodle. Not normally an issue but they're in the US, and my liability insurance doesn't cover me for goods sold in North America so with the customer's permission I'm reaching out to other leatherworkers. I will pass on the customer's email to anybody who replies that are willing and able to fulfill her needs and pass the "sniff" test.
For reference the collar she was interested in is two layers of waxy black pull-up leather, glued and sewn together for a total of 4mm thickness with a solid brass D and buckle, retailing at around GBP£20-25 for the size she needs.