We have had him neutered now and vaccinated and he has settled into domestic lifestyle far much better than we could have at any time imagined. I believe 4.5kgs would seem really a lower weight for an Grownup male British shorthair and appears to be at odds with breeder recommendations. https://manueliqxer.widblog.com/90342939/the-2-minute-rule-for-british-shorthair