Your cat does not ave to be a Maine Coon
I have fed RCMC for years long before buying it from ZooPlus. None of my cats have been or are Main Coon. They have been long and short haired, and one a Birman with only 2 teeth manages to chew them, it is uncanny how he manages to gum this hard bicuit to pieces.
I first fed RCMC about 20 years ago when I had a very big male cat, he could swipe thing of the kitchen worktop while standing on the floor. He swallowed whole almost every cat biscuit going, at one time I fed him dog biscuit in an attempt to get him to chew, he did not like it, and then I bought RCMC and then he started to chew.
All my cats have liked RCMC and in preference to other high quality smaller kibble biscuits, to a point where I am currently having to ration the RCMC to get them to finish off other biscuits.
By the way RCMC is not the only large kibble available from ZooPlus. Have a look at Happy Cat Supreme Adult Large Breed. Once all the small kibble biscuit is finished my cats will be getting just RCMC and HCSALB, and wet food for treats.
I have been shopping with ZooPlus for over a year. They have saved me money, and the effort of carrying heavy bags of food, and supplying loads of valuable information about manufacturers food nutrition. Delivery is consistently fast, and their customer service is first class. What more could you want from an on line supplier?