Leveling your dragons will require an increased amount of food, but the number of times you need to feed them to level up is always 4. So the amount of food needed to level up is 4 times the number of food per click.
The new food column is the numbers as they appear now. Up to Level 10 it is the same, but then they increase 30% per level after that. So, instead of growing a dragon from Level 1 to Level 30 costing 198,220, it now costs 4,204,601.
Level
Food per Click
Total Food for Level
Total Food Used
New Food Per Level
New Food Total
1
5
20
20
Same
Same
2
10
40
60
Same
Same
3
20
80
140
Same
Same
4
40
160
300
Same
Same
5
80
320
620
Same
Same
6
160
640
1,260
Same
Same
7
320
1,280
2,540
Same
Same
8
640
2,560
5,100
Same
Same
9
1,280
5,120
10,220
Same
Same
10
1,400
5,600
15,820
1,664
16,876
11
1,500
6,000
21,820
2,163
25,529
12
1,600
6,400
28,220
2,812
36,777
13
1,700
6,800
35,020
3,656
51,401
14
1,800
7,200
42,220
4,753
70,411
15
1,900
7,600
49,820
6,178
95,124
16
2,000
8,000
57,820
8,032
127,251
17
2,100
8,400
66,220
10,441
169,017
18
2,200
8,800
75,020
13,574
223,312
19
2,300
9,200
84,220
17,646
293,895
20
2,400
9,600
93,820
22,940
385,654
21
2,500
10,000
103,820
29,822
504,940
22
2,600
10,400
114,220
38,768
660,012
23
2,700
10,800
125,020
50,398
861,606
24
2,800
11,200
136,220
65,518
1,123,678
25
2,900
11,600
147,820
85,173
1,464,371
26
3,000
12,000
159,820
110,725
1,907,272
27
3,100
12,400
172,220
143,943
2,483,044
28
3,200
12,800
185,020
187,126
3,231,547
29
3,300
13,200
198,220
243,264
4,204,601
30
MAX
MAX
MAX
MAX
MAX
Trivia
For special occasions such as holidays, the appearance of the food can change. Halloween = Pumpkins, Thanksgiving = Turkey, Christmas = Muffins and for a few days around Valentine's Day (Feb 14th) = Chocolate Hearts, also the foods in the packs gives you double the amount of food, example the one costs 15 gems gives you 10,000 food, when doubled, it gives 20,000.
Food gifts now give 100 food, before it was 1000.
The primary diet of DC dragons is vegetarian. All the foods available from farming are either fruits or flowers. Several dragons do eat insects, and Pure Sea eats fish, but these are provided by their animation or habitats and cannot be raised on farms.