Hi Rosegarden2.
My mam is end stage Alzheimers, and my dad recently diagnosed.
Mam sleeps a lot, but is still hoisted to her her electronic chair for a few hours on the morning, and afternoon, so she gets a change of scene, temperature, and I can take her round the park if I get home in time (& it’s not raining).
Maybe ask the GP for an urgent dietician assessment. Even if swallowing is still ok, it may be easier for your husband to have a milk based nutritionally balanced prescription drink? My mam has a brand prescribed called ‘fresubin’ and the vanilla and Forrest fruit are lovely. Only 200ml per drink. So not too much in one sitting. Mam has 4 a day, plus 2 x Cadbury chocolate pots, and that’s all she has. (Plus squash to drink with thickener) She has all the calories he needs, but she can drink this before she falls asleep. Before mam deteriorated we bought Wiltshire farm food meals, that were balanced but quick for the carers, they even do puréed versions. I was buying supermarket ready meals, but very few have potatoes and veg with them. Maybe the nutrition drInk may help.
Take care xx