There could be several reasons why your cat is suddenly jumping on counters:
New pet – your cat may feel threatened when a brand-new pet enters the home. Scaling high helps them feel secure and avoid contact until introductions are complete.

Toddler addition – an infant may be a stressful and startling experience for a kitty. Practice gradual presentations in a controlled environment allowing the cat to feel in charge with a secure place to retreat to.

Hunger – a cat can become a ‘tiger’ if food is scarce. Put away all food leftovers, add cat puzzle feeders plus feed small frequent meals to avoid counter-scavenging.
Boredom – a bored cat will get up to mischief, so ensure your feline companion has sufficient self-play toys, catnip, and cardboard boxes to play with.

Thirst – the sink faucet may prove irresistible for a thirsty moggie, especially within the summer months or when faced with well-being changes. Early detection of increased water consumption is vital to prevent health issues.