When to seek professional help

This program covers the common case: a dog with typical excitement or chase interest meeting household cats. Some situations need more than a self-guided plan, and recognizing them early protects everyone.

Get professional help now, not later, if:

• Any bite or injury has occurred — the dog has bitten or shaken the cat, or the cat has injured the dog. Safety planning must come from a professional who has seen your animals.
• The dog has a known prey-drive history: has killed or seriously injured a cat, squirrel or other small animal before. This is not a training-app problem.
• Intense fixation doesn't soften: the dog is unable to eat, look away or respond at any distance, even across the house, after several days of trying.
• The cat's welfare is collapsing: hiding around the clock, not eating, eliminating outside the litter box for more than a couple of days.

Repeating a phase isn't progress — twice is a signal

Plateaus are normal, and repeating a day or two is built into the program. But if you have repeated the same phase twice with honest, well-managed sessions and still see no movement — same fixation, same setbacks — the plan needs professional eyes. More repetitions of a stuck phase rarely un-stick it.

Resource guarding

If the dog stiffens, growls or snaps when the cat approaches food, chews, toys, a bed or you, treat that as its own behavior problem, separate from the introduction. Manage it immediately (feed in separate rooms, remove contested items) and bring in a professional; guarding tends to intensify without a structured plan.

Who to look for

Seek credentialed, force-free help:

• A veterinary behaviorist (DACVB) — especially where anxiety, medication questions or a bite history are involved.
• A certified applied animal behaviorist (CAAB/ACAAB).
• A certified behavior consultant (IAABC, CBCC-KA) with specific dog–cat experience.

Ask directly: "What happens when the dog gets it wrong?" Anyone whose answer involves corrections, shock, prong collars or "showing him who's boss" will make a dog–cat problem worse. Rule out pain or illness with your regular vet, too — sudden behavior changes are medical until proven otherwise.

Asking for help early is not failure; it is what responsible training looks like.