Boston lettuce is a type of butterhead lettuce which has slightly larger leaves which are softer and more buttery.

They represent a kind of cultivated lettuce that forms a rounded head and has soft textured and yellow green inner leaves. The boston lettuce is also known as the bib lettuce or as the limestone lettuce.

Its leaves are soft and tender and they are buttery in textures. Their heads are small and round and so the leaves come out easily.

They are available in most parts of the year especially from June to September.

So can guinea pigs eat boston lettuce?

Let’s take a look at their nutritional data and find out more.

In particular, their acidic, water, sugar, fat, salt, calcium and phosphorus content is of interest as far as guinea pigs are concerned.

Nutritional value per 100 g (3.5 oz)
Energy 55 kJ (13 kcal)
Carbohydrates
2.23 g
Sugars 0.94
Dietary fiber 1.1 g
Fat
0.22 g
Protein
1.35 g
Vitamins
Vitamin A equiv.
beta-carotene
lutein zeaxanthin
(21%) 166 μg
(18%) 1987 μg
1223 μg
Thiamine (B1) (5%) 0.057 mg
Riboflavin (B2) (5%) 0.062 mg
Pantothenic acid (B5) (3%) 0.15 mg
Vitamin B6 (6%) 0.082 mg
Folate (B9) (18%) 73 μg
Vitamin C (4%) 3.7 mg
Vit E (1%) 0.18 mg
Vitamin K (97%) 102.3 μg
Minerals
Calcium (4%) 35 mg
Iron (10%) 1.24 mg
Magnesium (4%) 13 mg
Manganese (9%) 0.179 mg
Phosphorus (5%) 33 mg
Potassium (5%) 238 mg
Sodium (0%) 5 mg
Zinc (2%) 0.2 mg
Other constituents
Water 95.63 g

source wikipedia

As you can see, it contains a huge amount of water, a hint of salt, quite a bit of phosphorus and acidic content, and a little calcium.

This means that unfortunately, it is not a great food for piggies to eat due to amount of water it has in it.

Eating too much of it, will give them bloat and they will eat all of what you give them.

It is best avoided as a food for them.