For those of you with TONS of petfood in your inventory:
How did you get to the point of having that much as I would like to be in your situation one day. Was there a point in time where you just kept saving and did not use any until you had enough extra and felt safe too use 1 here and there? Just curious. I look up to you all lol.
I have between 80-100 petfood in my inventory, and I have been keeping that up for months. I also use about 6 a week and still keep the amount I have.
Basically, the trick is to use them in the most efficient way.
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The Brown Bear is nice to feed as it generates a lot of troops, but that doesn't mean it needs to be fed all the time. I feed it maybe once a month, often only once every 2 months. For that purpose I save up a lot of time-instants and supply-windfalls. To make the most of it I slowed down a bit on the tourneys for a month or 2, doing less than usual to save my troops, bringing them to a level that I wouldn't have to worry every week about having enough, but have a reserve and then pick up again. So now when my reserves get low I will do maybe 800-1.000 hours worth of time-instants at once. One feeding generates a crap load of troops that way so my reserves are fine for the next couple of weeks again.
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Keep an eye on the MA, don't miss the times petfood is shown and make sure to craft all of them,
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Doing the Spire and events helps too; the events will often provide some petfood (and the savory bites which generates a bit of petfood before it expires) and some Sips of clarity to cycle through the MA a bit faster. Cycling through means you will see more petfood appear, or rather see it again faster.
The Spire also can provide some free diamonds (or occasionally genies which may provide diamonds). If not saving diamonds for other things, they can help cycle through the MA again.
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Later in the game it will help to make use of the Polar bear and/or Timewarp. They reduce the time for the reset in the tourney, so you can do more rounds in the same time, which reduces the use of petfood for the Fire Phoenix. If you have only a small reduction in the time, you can easily do the first few rounds without feeding the bird and save that food for the later rounds where the squads are larger and thus losses are worse.
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Look at the effect of the feeding on the different pets. Is the result really worth it, or is it convenience? If it is convenience, you can probably save it, or only use it when it really does make a difference. The Raccoon for instance has a 55 hour effect, so if you feed it just before harvesting you can get 2 more harvests out of it, but do you really NEED those extra KPs (or seeds, or whatever you chose it to supply) or not? If it is to finish something in a rush it may be so (I used it to get extra seeds a few times in chap 20) but it's not something I keep fed all the time. And most pet-buildings are like that; only used rarely.
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If you mostly use the Firephoenix, and are a hardcore player and fighter, the best way to save petfood is to focus on getting the Polar Bear up and fully evolved, then invest in the Timewarp as soon as you can, as that combination will eventually lead to 0 time in between rounds of the tourney and thus be able to do 2 full tournaments with only 3 feedings; 1 Polar bear on Thursday evening, which will last 5 days. Maybe place military booster buildings, which also last 5 days, feed the bird and do, depending on the level of your Timewarp, all provinces for all rounds. Since the Polar bear will still be active Tuesday evening you can do that again with one more feeding. However, this strategy demands good timing and having a large stock of troops at the ready since all losses will be taken at once. But after that Tuesday you have time again until the Thursday of the next week to rebuild them again.
Getting the Brown Bear up and fully evolved will help regain troops. But everyone has to decide for themselves which effect is better for them. At least until you have both fully evolved of course, which is the best option, but that means crafting the artifacts for them, which usually requires other artifacts, or blueprints, and whether that sacrifice is worth it is something everyone will have to decide for themselves again.