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Are there any experiments on binocular rivalry in animals? (In humans, brain responses to Rubin's vase are for example well studied.)

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Yes! Binocular rivalry has been studied in monkeys (Logothetis & Schall, 1990; Lehky & Maunsell, 1996)
and extensively in cats (Fries, Roelfsema, Engel, König, & Singer, 1997; Sengpiel, Blakemore, & Harrad, 1995; Sengpiel, Blakemore, Kind, & Harrad, 1994; Sengpiel, Bonhoeffer, Freeman, & Blakemore, 2001; Varela & Singer, 1987; Moore, Spear, Kim, & Xue, 1992; Tong, Guido, Tumosa, Spear, & Heidenreich, 1992), to say the least. This is all the further I got into a literature search today, but I'm sure there's much more out there.

- Fries, P., Roelfsema, P. R., Engel, A. K., König, P., & Singer, W. (1997). Synchronization of oscillatory responses in visual cortex correlates with perception in interocular rivalry. Proceedings of the National Academy of Sciences, 94(23), 12699–12704. Retrieved from
- Lehky, S. R., & Maunsell, J. H. (1996). No binocular rivalry in the LGN of alert macaque monkeys. Vision Research, 36(9), 1225–1234. Retrieved from ScienceDirect.
- Logothetis, N. K., & Schall, J. D. (1990). Binocular motion rivalry in macaque monkeys: Eye dominance and tracking eye movements. Vision Research, 30(10), 1409–1419. Retrieved from
- Moore, R. J., Spear, P. D., Kim, C. B., & Xue, J. T. (1992). Binocular processing in the cat's dorsal lateral geniculate nucleus III. Spatial frequency, orientation, and direction sensitivity of nondominant-eye influences. Experimental Brain Research, 89(3), 588–598.
- Sengpiel, F., Blakemore, C., & Harrad, R. (1995). Interocular suppression in the primary visual cortex: A possible neural basis of binocular rivalry. Vision Research, 35(2), 179–195. Retrieved from ScienceDirect.
- Sengpiel, F., Blakemore, C., Kind, P. C., & Harrad, R. (1994). Interocular suppression in the visual cortex of strabismic cats. The Journal of Neuroscience, 14(11), 6855–6871. Retrieved from - Sengpiel, F., Bonhoeffer, T., Freeman, T. C., & Blakemore, C. (2001). On the relationship between interocular suppression in the primary visual cortex and binocular rivalry. Brain and Mind, 2(1), 39–54.
- Tong, L., Guido, W., Tumosa, N., Spear, P. D., & Heidenreich, S. (1992). Binocular interactions in the cat's dorsal lateral geniculate nucleus, II: Effects on dominant-eye spatial-frequency and contrast processing. Visual Neuroscience, 8(06), 557–566.
- Varela, F. J., & Singer, W. (1987). Neuronal dynamics in the visual corticothalamic pathway revealed through binocular rivalry. Experimental Brain Research, 66(1), 10–20.

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