Thanks so much for your very helpful reply. I am sorry you are having trouble with Tigger.
I see a couple of possibilities for his behavior.Fortunately, they all have solutions.
Due to the move and addition of another person, plus the outside cats, Tigger is a bit insecure about his territory and his standing in the hierarchy. Those outside cats are spraying on your house. Tigger can smell it and it worries him. He is afraid they will try to come in the house. Hence, he leaves urine around to say "HEY, Tigger lives here! This is HIS house!"
Every cats urine is his personal signature, his calling card, so to speak. So to stop this you must use zero odor to remove all the pee outside your house.
You can get a black light in a garden shop or ebay to show your exactly where it is.
Next spray with feliway to fool cats everything is already marked:
I would also use a scarecrow to keep those outdoor cats away from the house:
Believe me, Tigger can smell cat pee a block away. If it is on HIS house outside he will mark the inside walls, doors and thresholds to make sure HIS scent is the strongest.
The other issue can be dry food as it causes a condition called interstitial cystitis so Tigger may feel a burning sensation when he voids
Many times this is caused by a dry food diet:
Give him 3 drops of cranberry juice every day for ten days to lower the PH of his urine and stop the burning.
He may be a bit arthritic
Canned food is also excellent for arthritis as is a glucosimine supplement:
Make sure he is comfortable with the pans you are using as to size and locations
Please let me know how things are going. I will always be here for you.
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