It's their age. Eventually, they'll follow a schedule rather like my DTwatCats do;
7.30am. Wake up. Plod around the bed. Have a nap.
8.10am. Wake up. Make fuss of the occupants. Stand on the pillows. Have a nap.
8.40am. Wake up. Hungry now. Leap around the back of the bed, jump onto pillow right by occupants' faces. Jump onto dressing table. Jump back onto bed next to other occupant's face. Jump onto back of bed. Jump onto window sill.
8.45am. Follow occupant to bathroom and commence communal toileting ceremony. Possibly demand that occupant fills the sink with fresh water, as it tastes completely different drunk out of porcelain to from a fountain or festering green in the garden (which is obviously the best, but humans buy multiple kinds of water, why should cats be any different?)
8.50am. Sprint downstairs and wait expectantly at bowls. Eat, then leave house for fresh grass digestif and green pond water course. Occasionally murder a mouse as a palate cleanser..
8.59am. Return for litter digging and expulsion of grass and pond water over living room or kitchen floor.
9.00am. Nap Time. Settee and windowsill, possibly with some debates about who gets what location.
10.20am. Snack Time. Possibly daily exercise for seven minutes.
10.32am. Nap Time. Back of Settee and Cat Bed on coffee table.
12.20pm. Check the perimeter of the property. Possible opportunity for snacks.
12.30pm. Nap Time. Settee cushion, blanket and cat bed.
4.40pm. Up. The day has now started. Harass female occupant, argue who gets to be closest, bit of zooming and general twattery.
6.30pm. Nap Time.
7.30pm. Dinner Time and mooch in the garden for contemplation of Life, the Universe and Everything. Possibly slaughter a mouse if it is foolish enough to have the same idea.
8.30pm. Nap Time.
10.10pm. Up, check perimeter of house. Possible litter digging and a short zooming session - that one carpet in the entire house won't shred itself, you know.
10.30pm. Nap Time. Cat Bed on coffee table, possibly settee, possibly cardboard box behind armchair, possibly linen basket lid or supervising male occupant working in spare room (eyes closed for the process).
12.10am. Check humans are going to bed as expected. If they aren't, look at them with heavy eyes and will them to just go to bed.
12.11am. Cat #1 - appear on bed with delight for a 35 minute fussing session, climbing between occupants to ensure that Cat #2 isn't able to get near. Cat #2 - remain in cat bed on coffee table.
12.46am. Sleep time. Possibly a summoning call for a thousand demons, arachnid destruction derby or singing the song of their people around 4.30am, but generally, no movement at all.
One is eight this year and the other is sixteen.