I think he's referring to the dip in the body below the crop and above the chest.
Can you feel that area above the dip to see if it's soft or firm ( gently please). Your bird could be a tad under weight. The best way for you to know would be to invest in a small accurate scale that measures weight by grams or ounces. You will set the scale to weigh in grams.
Google "Gram Scales" so you know what I'm talking about.
You can also assess the weight by feeling the keel bone. This attached article has a great description on how to feel the keel bone. This is not to replace weighing your bird. It's a good idea to have a journal for your bird with the weights with the dates recorded and any other information you notice about your bird that may be helpful when you need to ask questions.
Keep your bird happy and healthy with our advice on diet and nutrition, preventative care, diseases and disorders and other health related issues.
www.thesprucepets.com
A little anatomy lesson for you:
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Diagram of a lovebirds body | | | |
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The various parts at the diagram on the left | | | |
1 | Cere | 12 | Thigh |
2 | Upper Mandiple | 13 | Secondaries |
3 | Lower Mandiple | 14 | Under Tail Coverts |
4 | Lores | 15 | Central Tail Feathers |
5 | Breast | 16 | Primarys |
6 | Lesser Wing Coverts | 17 | Rump |
7 | Secondary Wing Coverts | 18 | Scapulars |
8 | Abdomen | 19 | Mantle |
9 | Toes | 20 | Ear Coverts |
10 | Claw | 21 | Occiput (Crown) |
11 | Shank | 22 | Periophthalmic (eye) Ring |
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